U.S. patent application number 16/890652 was filed with the patent office on 2020-12-10 for waveform capability indication.
The applicant listed for this patent is QUALCOMM Incorporated. Invention is credited to Olufunmilola Omolade AWONIYI-OTERI, Vinay CHANDE, Arumugam CHENDAMARAI KANNAN, Zhifei FAN, Tao LUO, Sungwoo PARK, Jing SUN, Srinivas YERRAMALLI, Xiaoxia ZHANG.
Application Number | 20200389786 16/890652 |
Document ID | / |
Family ID | 1000004898426 |
Filed Date | 2020-12-10 |
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United States Patent
Application |
20200389786 |
Kind Code |
A1 |
YERRAMALLI; Srinivas ; et
al. |
December 10, 2020 |
WAVEFORM CAPABILITY INDICATION
Abstract
Various aspects of the present disclosure generally relate to
wireless communication. In some aspects, a user equipment (UE) may
receive an indication of one or more waveforms supported by a base
station, wherein the one or more waveforms include at least one of
an orthogonal frequency division multiplexing (OFDM) waveform, a
single carrier frequency domain (SC-FD) waveform, or a single
carrier time domain (SC-TD) waveform. The UE may determine whether
the UE is capable of communicating with the base station based at
least in part on the indication. The UE may selectively communicate
with the base station using at least one waveform of the one or
more waveforms based at least in part on the determination.
Numerous other aspects are provided.
Inventors: |
YERRAMALLI; Srinivas; (San
Diego, CA) ; ZHANG; Xiaoxia; (San Diego, CA) ;
LUO; Tao; (San Diego, CA) ; AWONIYI-OTERI;
Olufunmilola Omolade; (San Diego, CA) ; CHENDAMARAI
KANNAN; Arumugam; (San Diego, CA) ; PARK;
Sungwoo; (San Diego, CA) ; CHANDE; Vinay; (San
Diego, CA) ; SUN; Jing; (San Diego, CA) ; FAN;
Zhifei; (San Diego, CA) |
|
Applicant: |
Name |
City |
State |
Country |
Type |
QUALCOMM Incorporated |
San Diego |
CA |
US |
|
|
Family ID: |
1000004898426 |
Appl. No.: |
16/890652 |
Filed: |
June 2, 2020 |
Related U.S. Patent Documents
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Application
Number |
Filing Date |
Patent Number |
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62858684 |
Jun 7, 2019 |
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Current U.S.
Class: |
1/1 |
Current CPC
Class: |
H04W 8/22 20130101; H04W
56/0015 20130101; H04W 74/0833 20130101 |
International
Class: |
H04W 8/22 20060101
H04W008/22; H04W 56/00 20060101 H04W056/00; H04W 74/08 20060101
H04W074/08 |
Claims
1. A method of wireless communication performed by a user equipment
(UE), comprising: receiving an indication of one or more waveforms
supported by a base station, wherein the one or more waveforms
include at least one of an orthogonal frequency division
multiplexing (OFDM) waveform, a single carrier frequency domain
(SC-FD) waveform, or a single carrier time domain (SC-TD) waveform;
determining whether the UE is capable of communicating with the
base station based at least in part on the indication; and
selectively communicating with the base station using at least one
waveform of the one or more waveforms based at least in part on the
determination.
2. The method of claim 1, wherein the indication further indicates
whether the one or more waveforms are supported for transmission,
for reception, or for both transmission and reception.
3. The method of claim 1, wherein the indication is received in at
least one of a physical broadcast channel communication, remaining
minimum system information, other system information, a radio
resource control message, a medium access control (MAC) control
element, downlink control information, or a combination
thereof.
4. The method of claim 1, wherein the indication is received via a
signal that is scrambled or modified to indicate the one or more
waveforms.
5. The method of claim 4, wherein the signal includes at least one
of a primary synchronization signal, a secondary synchronization
signal, a physical broadcast channel demodulation reference signal,
a physical broadcast channel cyclic redundancy check, a reference
signal in a synchronization signal block, or a combination
thereof.
6. The method of claim 1, further comprising monitoring for at
least one of a first set of synchronization signal blocks
transmitted using the OFDM waveform or a second set of
synchronization signal blocks transmitted using at least one of the
SC-FD waveform or the SC-TD waveform.
7. The method of claim 1, further comprising monitoring for at
least one of first remaining minimum system information transmitted
using the OFDM waveform or second remaining minimum system
information transmitted using at least one of the SC-FD waveform or
the SC-TD waveform.
8. The method of claim 1, further comprising receiving a physical
broadcast channel (PBCH) payload transmitted using a first waveform
of the OFDM waveform or at least one of the SC-FD waveform or the
SC-TD waveform, wherein the PBCH payload indicates a location of at
least one of a synchronization signal block or remaining minimum
system information transmitted using a second waveform of the OFDM
waveform or the at least one of the SC-FD waveform or the SC-TD
waveform.
9. The method of claim 1, further comprising receiving remaining
minimum system information that indicates a first set of random
access channel (RACH) resources for the OFDM waveform and a second
set of RACH resources for at least one of the SC-FD waveform or the
SC-TD waveform.
10. The method of claim 1, further comprising transmitting an
indication of one or more waveforms supported by the UE, wherein
the one or more waveforms supported by the UE include at least one
of the OFDM waveform, the SC-FD waveform, or the SC-TD
waveform.
11. The method of claim 10, wherein the one or more waveforms
supported by the UE are indicated using at least one of: a UE
capability information message associated with initial network
registration, a UE capability report associated with a radio
resource control procedure, a random access procedure (RACH)
message, or a combination thereof.
12. The method of claim 11, wherein the one or more waveforms
supported by the UE are indicated using the RACH message based at
least in part on a set of resources used by the UE to transmit the
RACH message, wherein a first set of resources for the RACH message
indicates the OFDM waveform and a second set of resources for the
RACH message indicates at least one of the SC-FD waveform or the
SC-TD waveform.
13. The method of claim 1, further comprising receiving a
configuration that indicates a first set of resources to be used
for paging messages transmitted using the OFDM waveform and a
second set of resources to be used for paging messages transmitted
using at least one of the SC-FD waveform or the SC-TD waveform.
14. The method of claim 13, further comprising monitoring at least
one of the first set of resources or the second set of resources
based at least in part on one or more waveforms supported by the
UE.
15. The method of claim 13, wherein the first set of resources are
associated with a first channel and the second set of resources are
associated with a second channel.
16. The method of claim 15, wherein the first channel is a control
channel and the second channel is a data channel.
17. The method of claim 1, wherein the base station is one of a
serving base station, that serves the UE, or a neighbor base
station.
18. The method of claim 17, further comprising selecting the
neighbor base station for handover based at least in part on the
one or more waveforms supported by the neighbor base station.
19. The method of claim 1, wherein the one or more waveforms are
beam-specific, and wherein the UE is configured to reset at least
one of a media access control buffer or a radio link control buffer
when the UE switches from a first beam to a second beam.
20. A method of wireless communication performed by a base station,
comprising: transmitting an indication of one or more waveforms
supported by the base station, wherein the one or more waveforms
include at least one of an orthogonal frequency division
multiplexing (OFDM) waveform, a single carrier frequency domain
(SC-FD) waveform, or a single carrier time domain (SC-TD) waveform;
and communicating with a user equipment (UE) using at least one
waveform of the one or more waveforms.
21. The method of claim 20, wherein the indication is transmitted
in at least one of a physical broadcast channel communication,
remaining minimum system information, other system information, a
radio resource control message, a medium access control (MAC)
control element, downlink control information, a signal that is
scrambled or modified to indicate the one or more waveforms, or a
combination thereof.
22. The method of claim 20, further comprising transmitting a first
set of synchronization signal blocks using the OFDM waveform and a
second set of synchronization signal blocks using at least one of
the SC-FD waveform or the SC-TD waveform.
23. The method of claim 20, further comprising transmitting first
remaining minimum system information using the OFDM waveform and
second remaining minimum system information using at least one of
the SC-FD waveform or the SC-TD waveform.
24. The method of claim 20, further comprising transmitting a
physical broadcast channel (PBCH) payload using a first waveform of
the OFDM waveform or at least one of the SC-FD waveform or the
SC-TD waveform, wherein the PBCH payload indicates a location of at
least one of a synchronization signal block or remaining minimum
system information that is transmitted using a second waveform of
the OFDM waveform or the at least one of the SC-FD waveform or the
SC-TD waveform.
25. The method of claim 20, further comprising transmitting
remaining minimum system information that indicates a first set of
random access channel (RACH) resources for the OFDM waveform and a
second set of RACH resources for at least one of the SC-FD waveform
or the SC-TD waveform.
26. The method of claim 20, further comprising receiving an
indication of one or more waveforms supported by the UE, wherein
the one or more waveforms supported by the UE include at least one
of the OFDM waveform, the SC-FD waveform, or the SC-TD
waveform.
27. The method of claim 20, further comprising transmitting a
configuration that indicates a first set of resources to be used
for paging messages transmitted using the OFDM waveform and a
second set of resources to be used for paging messages transmitted
using at least one of the SC-FD waveform or the SC-TD waveform.
28. The method of claim 20, further comprising receiving an
indication of one or more waveforms supported by a neighbor base
station; and transmitting, to the UE, an indication of the one or
more waveforms supported by the neighbor base station.
29. A user equipment (UE) for wireless communication, comprising: a
memory; and one or more processors operatively coupled to the
memory, the memory and the one or more processors configured to:
receive an indication of one or more waveforms supported by a base
station, wherein the one or more waveforms include at least one of
an orthogonal frequency division multiplexing (OFDM) waveform, a
single carrier frequency domain (SC-FD) waveform, or a single
carrier time domain (SC-TD) waveform; determine whether the UE is
capable of communicating with the base station based at least in
part on the indication; and selectively communicate with the base
station using at least one waveform of the one or more waveforms
based at least in part on the determination.
30. A base station for wireless communication, comprising: a
memory; and one or more processors operatively coupled to the
memory, the memory and the one or more processors configured to:
transmit an indication of one or more waveforms supported by the
base station, wherein the one or more waveforms include at least
one of an orthogonal frequency division multiplexing (OFDM)
waveform, a single carrier frequency domain (SC-FD) waveform, or a
single carrier time domain (SC-TD) waveform; and communicate with a
user equipment (UE) using at least one waveform of the one or more
waveforms.
Description
CROSS-REFERENCE TO RELATED APPLICATION
[0001] This Patent Application claims priority to U.S. Provisional
Patent Application No. 62/858,684, filed on Jun. 7, 2019, entitled
"WAVEFORM CAPABILITY INDICATION," and assigned to the assignee
hereof. The disclosure of the prior Application is considered part
of and is incorporated by reference in this Patent Application.
FIELD OF THE DISCLOSURE
[0002] Aspects of the present disclosure generally relate to
wireless communication and to techniques and apparatuses for
waveform capability indication.
BACKGROUND
[0003] Wireless communication systems are widely deployed to
provide various telecommunication services such as telephony,
video, data, messaging, and broadcasts. Typical wireless
communication systems may employ multiple-access technologies
capable of supporting communication with multiple users by sharing
available system resources (e.g., bandwidth, transmit power, and/or
the like). Examples of such multiple-access technologies include
code division multiple access (CDMA) systems, time division
multiple access (TDMA) systems, frequency-division multiple access
(FDMA) systems, orthogonal frequency-division multiple access
(OFDMA) systems, single-carrier frequency-division multiple access
(SC-FDMA) systems, time division synchronous code division multiple
access (TD-SCDMA) systems, and Long Term Evolution (LTE).
LTE/LTE-Advanced is a set of enhancements to the Universal Mobile
Telecommunications System (UMTS) mobile standard promulgated by the
Third Generation Partnership Project (3GPP).
[0004] A wireless communication network may include a number of
base stations (BSs) that can support communication for a number of
user equipment (UEs). A user equipment (UE) may communicate with a
base station (BS) via the downlink and uplink. The downlink (or
forward link) refers to the communication link from the BS to the
UE, and the uplink (or reverse link) refers to the communication
link from the UE to the BS. As will be described in more detail
herein, a BS may be referred to as a Node B, a gNB, an access point
(AP), a radio head, a transmit receive point (TRP), a New Radio
(NR) BS, a 5G Node B, and/or the like.
[0005] The above multiple access technologies have been adopted in
various telecommunication standards to provide a common protocol
that enables different user equipment to communicate on a
municipal, national, regional, and even global level. New Radio
(NR), which may also be referred to as 5G, is a set of enhancements
to the LTE mobile standard promulgated by the Third Generation
Partnership Project (3GPP). NR is designed to better support mobile
broadband Internet access by improving spectral efficiency,
lowering costs, improving services, making use of new spectrum, and
better integrating with other open standards using orthogonal
frequency division multiplexing (OFDM) with a cyclic prefix (CP)
(CP-OFDM) on the downlink (DL), using CP-OFDM and/or SC-FDM (e.g.,
also known as discrete Fourier transform spread OFDM (DFT-s-OFDM))
on the uplink (UL), as well as supporting beamforming,
multiple-input multiple-output (MIMO) antenna technology, and
carrier aggregation. However, as the demand for mobile broadband
access continues to increase, there exists a need for further
improvements in LTE and NR technologies. Preferably, these
improvements should be applicable to other multiple access
technologies and the telecommunication standards that employ these
technologies.
SUMMARY
[0006] In some aspects, a method of wireless communication,
performed by a user equipment (UE), may include receiving an
indication of one or more waveforms supported by a base station,
wherein the one or more waveforms include at least one of an
orthogonal frequency division multiplexing (OFDM) waveform, a
single carrier frequency domain (SC-FD) waveform, or a single
carrier time domain (SC-TD) waveform; determining whether the UE is
capable of communicating with the base station based at least in
part on the indication; and selectively communicating with the base
station using at least one waveform of the one or more waveforms
based at least in part on the determination.
[0007] In some aspects, a method of wireless communication,
performed by a base station, may include transmitting an indication
of one or more waveforms supported by the base station, wherein the
one or more waveforms include at least one of an OFDM waveform, an
SC-FD waveform, or an SC-TD waveform; and communicating with a UE
using at least one waveform of the one or more waveforms.
[0008] In some aspects, a UE for wireless communication may include
memory and one or more processors operatively coupled to the
memory. The memory and the one or more processors may be configured
to receive an indication of one or more waveforms supported by a
base station, wherein the one or more waveforms include at least
one of an OFDM waveform, an SC-FD waveform, or an SC-TD waveform;
determine whether the UE is capable of communicating with the base
station based at least in part on the indication; and selectively
communicate with the base station using at least one waveform of
the one or more waveforms based at least in part on the
determination.
[0009] In some aspects, a base station for wireless communication
may include memory and one or more processors operatively coupled
to the memory. The memory and the one or more processors may be
configured to transmit an indication of one or more waveforms
supported by the base station, wherein the one or more waveforms
include at least one of an OFDM waveform, an SC-FD waveform, or an
SC-TD waveform; and communicate with a UE using at least one
waveform of the one or more waveforms.
[0010] In some aspects, a non-transitory computer-readable medium
may store one or more instructions for wireless communication. The
one or more instructions, when executed by one or more processors
of a UE, may cause the one or more processors to: receive an
indication of one or more waveforms supported by a base station,
wherein the one or more waveforms include at least one of an OFDM
waveform, an SC-FD waveform, or an SC-TD waveform; determine
whether the UE is capable of communicating with the base station
based at least in part on the indication; and selectively
communicate with the base station using at least one waveform of
the one or more waveforms based at least in part on the
determination.
[0011] In some aspects, a non-transitory computer-readable medium
may store one or more instructions for wireless communication. The
one or more instructions, when executed by one or more processors
of a base station, may cause the one or more processors to:
transmit an indication of one or more waveforms supported by the
base station, wherein the one or more waveforms include at least
one of an OFDM waveform, an SC-FD waveform, or an SC-TD waveform;
and communicate with a UE using at least one waveform of the one or
more waveforms.
[0012] In some aspects, an apparatus for wireless communication may
include means for receiving an indication of one or more waveforms
supported by a base station, wherein the one or more waveforms
include at least one of an OFDM waveform, an SC-FD waveform, or an
SC-TD waveform; means for determining whether the apparatus is
capable of communicating with the base station based at least in
part on the indication; and means for selectively communicating
with the base station using at least one waveform of the one or
more waveforms based at least in part on the determination.
[0013] In some aspects, an apparatus for wireless communication may
include means for transmitting an indication of one or more
waveforms supported by the apparatus, wherein the one or more
waveforms include at least one of an OFDM waveform, an SC-FD
waveform, or an SC-TD waveform; and means for communicating with a
UE using at least one waveform of the one or more waveforms.
[0014] Aspects generally include a method, apparatus, system,
computer program product, non-transitory computer-readable medium,
user equipment, base station, wireless communication device, and/or
processing system as substantially described herein with reference
to and as illustrated by the accompanying drawings and
specification.
[0015] The foregoing has outlined rather broadly the features and
technical advantages of examples according to the disclosure in
order that the detailed description that follows may be better
understood. Additional features and advantages will be described
hereinafter. The conception and specific examples disclosed may be
readily utilized as a basis for modifying or designing other
structures for carrying out the same purposes of the present
disclosure. Such equivalent constructions do not depart from the
scope of the appended claims. Characteristics of the concepts
disclosed herein, both their organization and method of operation,
together with associated advantages will be better understood from
the following description when considered in connection with the
accompanying figures. Each of the figures is provided for the
purposes of illustration and description, and not as a definition
of the limits of the claims.
BRIEF DESCRIPTION OF THE DRAWINGS
[0016] So that the above-recited features of the present disclosure
can be understood in detail, a more particular description, briefly
summarized above, may be had by reference to aspects, some of which
are illustrated in the appended drawings. It is to be noted,
however, that the appended drawings illustrate only certain typical
aspects of this disclosure and are therefore not to be considered
limiting of its scope, for the description may admit to other
equally effective aspects. The same reference numbers in different
drawings may identify the same or similar elements.
[0017] FIG. 1 is a diagram illustrating an example of a wireless
communication network, in accordance with various aspects of the
present disclosure.
[0018] FIG. 2 is a diagram illustrating an example of a base
station in communication with a UE in a wireless communication
network, in accordance with various aspects of the present
disclosure.
[0019] FIG. 3 is a diagram illustrating an example of network
access using different waveforms, in accordance with various
aspects of the present disclosure.
[0020] FIG. 4 is a diagram illustrating an example of different UE
waveform capabilities and different base station waveform
capabilities, in accordance with various aspects of the present
disclosure.
[0021] FIGS. 5-9 are diagrams illustrating examples of waveform
capability indication, in accordance with various aspects of the
present disclosure.
[0022] FIG. 10 is a diagram illustrating an example process
performed, for example, by a user equipment, in accordance with
various aspects of the present disclosure.
[0023] FIG. 11 is a diagram illustrating an example process
performed, for example, by a base station, in accordance with
various aspects of the present disclosure.
[0024] FIG. 12 is a diagram illustrating an example of a
transmitter architecture and a receiver architecture for
transmitting or receiving different waveforms, in accordance with
various aspects of the present disclosure.
DETAILED DESCRIPTION
[0025] Various aspects of the disclosure are described more fully
hereinafter with reference to the accompanying drawings. This
disclosure may, however, be embodied in many different forms and
should not be construed as limited to any specific structure or
function presented throughout this disclosure. Rather, these
aspects are provided so that this disclosure will be thorough and
complete, and will fully convey the scope of the disclosure to
those skilled in the art. Based on the teachings herein one skilled
in the art should appreciate that the scope of the disclosure is
intended to cover any aspect of the disclosure disclosed herein,
whether implemented independently of or combined with any other
aspect of the disclosure. For example, an apparatus may be
implemented or a method may be practiced using any number of the
aspects set forth herein. In addition, the scope of the disclosure
is intended to cover such an apparatus or method which is practiced
using other structure, functionality, or structure and
functionality in addition to or other than the various aspects of
the disclosure set forth herein. It should be understood that any
aspect of the disclosure disclosed herein may be embodied by one or
more elements of a claim.
[0026] Several aspects of telecommunication systems will now be
presented with reference to various apparatuses and techniques.
These apparatuses and techniques will be described in the following
detailed description and illustrated in the accompanying drawings
by various blocks, modules, components, circuits, steps, processes,
algorithms, and/or the like (collectively referred to as
"elements"). These elements may be implemented using hardware,
software, or combinations thereof. Whether such elements are
implemented as hardware or software depends upon the particular
application and design constraints imposed on the overall
system.
[0027] It should be noted that while aspects may be described
herein using terminology commonly associated with 3G and/or 4G
wireless technologies, aspects of the present disclosure can be
applied in other generation-based communication systems, such as 5G
and later, including NR technologies.
[0028] FIG. 1 is a diagram illustrating a wireless network 100 in
which aspects of the present disclosure may be practiced. The
wireless network 100 may be an LTE network or some other wireless
network, such as a 5G or NR network. The wireless network 100 may
include a number of BSs 110 (shown as BS 110a, BS 110b, BS 110c,
and BS 110d) and other network entities. A BS is an entity that
communicates with user equipment (UEs) and may also be referred to
as a base station, a NR BS, a Node B, a gNB, a 5G node B (NB), an
access point, a transmit receive point (TRP), and/or the like. Each
BS may provide communication coverage for a particular geographic
area. In 3GPP, the term "cell" can refer to a coverage area of a BS
and/or a BS subsystem serving this coverage area, depending on the
context in which the term is used.
[0029] A BS may provide communication coverage for a macro cell, a
pico cell, a femto cell, and/or another type of cell. A macro cell
may cover a relatively large geographic area (e.g., several
kilometers in radius) and may allow unrestricted access by UEs with
service subscription. A pico cell may cover a relatively small
geographic area and may allow unrestricted access by UEs with
service subscription. A femto cell may cover a relatively small
geographic area (e.g., a home) and may allow restricted access by
UEs having association with the femto cell (e.g., UEs in a closed
subscriber group (CSG)). A BS for a macro cell may be referred to
as a macro BS. A BS for a pico cell may be referred to as a pico
BS. A BS for a femto cell may be referred to as a femto BS or a
home BS. In the example shown in FIG. 1, a BS 110a may be a macro
BS for a macro cell 102a, a BS 110b may be a pico BS for a pico
cell 102b, and a BS 110c may be a femto BS for a femto cell 102c. A
BS may support one or multiple (e.g., three) cells. The terms
"eNB", "base station", "NR BS", "gB", "TRP", "AP", "node B", "5G
NB", and "cell" may be used interchangeably herein.
[0030] In some aspects, a cell may not necessarily be stationary,
and the geographic area of the cell may move according to the
location of a mobile BS. In some aspects, the BSs may be
interconnected to one another and/or to one or more other BSs or
network nodes (not shown) in the wireless network 100 through
various types of backhaul interfaces such as a direct physical
connection, a virtual network, and/or the like using any suitable
transport network.
[0031] Wireless network 100 may also include relay stations. A
relay station is an entity that can receive a transmission of data
from an upstream station (e.g., a BS or a UE) and send a
transmission of the data to a downstream station (e.g., a UE or a
BS). A relay station may also be a UE that can relay transmissions
for other UEs. In the example shown in FIG. 1, a relay station 110d
may communicate with macro BS 110a and a UE 120d in order to
facilitate communication between BS 110a and UE 120d. A relay
station may also be referred to as a relay BS, a relay base
station, a relay, and/or the like.
[0032] Wireless network 100 may be a heterogeneous network that
includes BSs of different types, e.g., macro BSs, pico BSs, femto
BSs, relay BSs, and/or the like. These different types of BSs may
have different transmit power levels, different coverage areas, and
different impacts on interference in wireless network 100. For
example, macro BSs may have a high transmit power level (e.g., 5 to
40 Watts) whereas pico BSs, femto BSs, and relay BSs may have lower
transmit power levels (e.g., 0.1 to 2 Watts).
[0033] A network controller 130 may couple to a set of BSs and may
provide coordination and control for these BSs. Network controller
130 may communicate with the BSs via a backhaul. The BSs may also
communicate with one another, e.g., directly or indirectly via a
wireless or wireline backhaul.
[0034] UEs 120 (e.g., 120a, 120b, 120c) may be dispersed throughout
wireless network 100, and each UE may be stationary or mobile. A UE
may also be referred to as an access terminal, a terminal, a mobile
station, a subscriber unit, a station, and/or the like. A UE may be
a cellular phone (e.g., a smart phone), a personal digital
assistant (PDA), a wireless modem, a wireless communication device,
a handheld device, a laptop computer, a cordless phone, a wireless
local loop (WLL) station, a tablet, a camera, a gaming device, a
netbook, a smartbook, an ultrabook, a medical device or equipment,
biometric sensors/devices, wearable devices (smart watches, smart
clothing, smart glasses, smart wrist bands, smart jewelry (e.g.,
smart ring, smart bracelet)), an entertainment device (e.g., a
music or video device, or a satellite radio), a vehicular component
or sensor, smart meters/sensors, industrial manufacturing
equipment, a global positioning system device, or any other
suitable device that is configured to communicate via a wireless or
wired medium.
[0035] Some UEs may be considered machine-type communication (MTC)
or evolved or enhanced machine-type communication (eMTC) UEs. MTC
and eMTC UEs include, for example, robots, drones, remote devices,
sensors, meters, monitors, location tags, and/or the like, that may
communicate with a base station, another device (e.g., remote
device), or some other entity. A wireless node may provide, for
example, connectivity for or to a network (e.g., a wide area
network such as Internet or a cellular network) via a wired or
wireless communication link. Some UEs may be considered
Internet-of-Things (IoT) devices, and/or may be implemented as
NB-IoT (narrowband internet of things) devices. Some UEs may be
considered a Customer Premises Equipment (CPE). UE 120 may be
included inside a housing that houses components of UE 120, such as
processor components, memory components, and/or the like.
[0036] In general, any number of wireless networks may be deployed
in a given geographic area. Each wireless network may support a
particular RAT and may operate on one or more frequencies. A RAT
may also be referred to as a radio technology, an air interface,
and/or the like. A frequency may also be referred to as a carrier,
a frequency channel, and/or the like. Each frequency may support a
single RAT in a given geographic area in order to avoid
interference between wireless networks of different RATs. In some
cases, NR or 5G RAT networks may be deployed.
[0037] In some aspects, two or more UEs 120 (e.g., shown as UE 120a
and UE 120e) may communicate directly using one or more sidelink
channels (e.g., without using a base station 110 as an intermediary
to communicate with one another). For example, the UEs 120 may
communicate using peer-to-peer (P2P) communications,
device-to-device (D2D) communications, a vehicle-to-everything
(V2X) protocol (e.g., which may include a vehicle-to-vehicle (V2V)
protocol, a vehicle-to-infrastructure (V2I) protocol, and/or the
like), a mesh network, and/or the like. In this case, the UE 120
may perform scheduling operations, resource selection operations,
and/or other operations described elsewhere herein as being
performed by the base station 110.
[0038] As indicated above, FIG. 1 is provided as an example. Other
examples may differ from what is described with regard to FIG.
1.
[0039] FIG. 2 shows a block diagram of a design 200 of base station
110 and UE 120, which may be one of the base stations and one of
the UEs in FIG. 1. Base station 110 may be equipped with T antennas
234a through 234t, and UE 120 may be equipped with R antennas 252a
through 252r, where in general T.gtoreq.1 and R.gtoreq.1.
[0040] At base station 110, a transmit processor 220 may receive
data from a data source 212 for one or more UEs, select one or more
modulation and coding schemes (MCS) for each UE based at least in
part on channel quality indicators (CQIs) received from the UE,
process (e.g., encode and modulate) the data for each UE based at
least in part on the MCS(s) selected for the UE, and provide data
symbols for all UEs. Transmit processor 220 may also process system
information (e.g., for semi-static resource partitioning
information (SRPI) and/or the like) and control information (e.g.,
CQI requests, grants, upper layer signaling, and/or the like) and
provide overhead symbols and control symbols. Transmit processor
220 may also generate reference symbols for reference signals
(e.g., the cell-specific reference signal (CRS)) and
synchronization signals (e.g., the primary synchronization signal
(PSS) and secondary synchronization signal (SSS)). A transmit (TX)
multiple-input multiple-output (MIMO) processor 230 may perform
spatial processing (e.g., precoding) on the data symbols, the
control symbols, the overhead symbols, and/or the reference
symbols, if applicable, and may provide T output symbol streams to
T modulators (MODs) 232a through 232t. Each modulator 232 may
process a respective output symbol stream (e.g., for OFDM and/or
the like) to obtain an output sample stream. Each modulator 232 may
further process (e.g., convert to analog, amplify, filter, and
upconvert) the output sample stream to obtain a downlink signal. T
downlink signals from modulators 232a through 232t may be
transmitted via T antennas 234a through 234t, respectively.
According to various aspects described in more detail below, the
synchronization signals can be generated with location encoding to
convey additional information.
[0041] At UE 120, antennas 252a through 252r may receive the
downlink signals from base station 110 and/or other base stations
and may provide received signals to demodulators (DEMODs) 254a
through 254r, respectively. Each demodulator 254 may condition
(e.g., filter, amplify, downconvert, and digitize) a received
signal to obtain input samples. Each demodulator 254 may further
process the input samples (e.g., for OFDM and/or the like) to
obtain received symbols. A MIMO detector 256 may obtain received
symbols from all R demodulators 254a through 254r, perform MIMO
detection on the received symbols if applicable, and provide
detected symbols. A receive processor 258 may process (e.g.,
demodulate and decode) the detected symbols, provide decoded data
for UE 120 to a data sink 260, and provide decoded control
information and system information to a controller/processor 280. A
channel processor may determine reference signal received power
(RSRP), received signal strength indicator (RSSI), reference signal
received quality (RSRQ), channel quality indicator (CQI), and/or
the like. In some aspects, one or more components of UE 120 may be
included in a housing 284.
[0042] On the uplink, at UE 120, a transmit processor 264 may
receive and process data from a data source 262 and control
information (e.g., for reports comprising RSRP, RSSI, RSRQ, CQI,
and/or the like) from controller/processor 280. Transmit processor
264 may also generate reference symbols for one or more reference
signals. The symbols from transmit processor 264 may be precoded by
a TX MIMO processor 266 if applicable, further processed by
modulators 254a through 254r (e.g., for DFT-s-OFDM, CP-OFDM, and/or
the like), and transmitted to base station 110. At base station
110, the uplink signals from UE 120 and other UEs may be received
by antennas 234, processed by demodulators 232, detected by a MIMO
detector 236 if applicable, and further processed by a receive
processor 238 to obtain decoded data and control information sent
by UE 120. Receive processor 238 may provide the decoded data to a
data sink 239 and the decoded control information to
controller/processor 240. Base station 110 may include
communication unit 244 and communicate to network controller 130
via communication unit 244. Network controller 130 may include
communication unit 294, controller/processor 290, and memory
292.
[0043] Controller/processor 240 of base station 110,
controller/processor 280 of UE 120, and/or any other component(s)
of FIG. 2 may perform one or more techniques associated with
waveform capability indication, as described in more detail
elsewhere herein. For example, controller/processor 240 of base
station 110, controller/processor 280 of UE 120, and/or any other
component(s) of FIG. 2 may perform or direct operations of, for
example, process 1000 of FIG. 10, process 1100 of FIG. 11, and/or
other processes as described herein. Memories 242 and 282 may store
data and program codes for base station 110 and UE 120,
respectively. A scheduler 246 may schedule UEs for data
transmission on the downlink and/or uplink.
[0044] In some aspects, UE 120 may include means for receiving an
indication of one or more waveforms supported by a base station,
wherein the one or more waveforms include at least one of an
orthogonal frequency division multiplexing (OFDM) waveform, a
single carrier frequency domain (SC-FD) waveform, or a single
carrier time domain (SC-TD) waveform; means for determining whether
the UE 120 is capable of communicating with the base station based
at least in part on the indication; means for selectively
communicating with the base station using at least one waveform of
the one or more waveforms based at least in part on the
determination; and/or the like. In some aspects, such means may
include one or more components of UE 120 described in connection
with FIG. 2.
[0045] In some aspects, base station 110 may include means for
transmitting an indication of one or more waveforms supported by
the apparatus, wherein the one or more waveforms include at least
one of an OFDM waveform, an SC-FD waveform, or an SC-TD waveform;
means for communicating with a UE using at least one waveform of
the one or more waveforms; and/or the like. In some aspects, such
means may include one or more components of base station 110
described in connection with FIG. 2.
[0046] As indicated above, FIG. 2 is provided as an example. Other
examples may differ from what is described with regard to FIG.
2.
[0047] FIG. 3 is a diagram illustrating an example 300 of network
access using different waveforms, in accordance with various
aspects of the present disclosure.
[0048] As shown by reference number 305, a UE may perform a network
access procedure using an initial bandwidth part (BWP), which may
be a BWP reserved for or dedicated to initial network access. A
base station may transmit synchronization system blocks (SSBs) on
the initial BWP, and the UE may measure one or more SSBs. Based at
least in part on the measurements, the UE may determine system
timing, may identify one or more beams for communicating with the
base station, and/or the like. As shown by reference number 310,
after obtaining one or more SSBs, a UE and a base station may
communicate using a particular waveform, such as a CP-OFDM waveform
or a single carrier (SC) waveform.
[0049] Some NR frequency bands, such as frequency range 1 (FR1)
(e.g., a sub-6 GHz frequency band) and FR2 (e.g., a millimeter wave
frequency band that includes frequency bands above, for example, 24
GHz), may operate using an OFDM waveform for downlink
communications and may operate using either the OFDM waveform or an
SC waveform for uplink communications. The OFDM waveform may use a
cyclic prefix (CP), and in such cases may be referred to as a
CP-OFDM waveform. The OFDM waveform may provide a relatively high
signal-to-noise ratio (SNR), a relatively high spectral efficiency,
and/or a relative high order single user and/or multi-user MIMO
(e.g., as compared to the SC waveform). The SC waveform may include
a discrete Fourier transform spread OFDM (DFT-s-OFDM)). The SC
waveform may provide a relatively low peak to average power ratio
(PAPR) for better coverage and/or a relatively low complexity for
reception and transmission (e.g., as compared to the OFDM
waveform). The SC waveform may include, for example, a single
carrier time domain (SC-TD) waveform or a single carrier frequency
domain (SC-FD) waveform.
[0050] NR may include other frequency ranges, such as frequency
range 4 (FR4), which may include spectrum between 52 GHz and 115
GHz. For FR4, an SC waveform may be used for downlink
communications, unlike for FR1 and for FR2, to improve PAPR and
reduce complexity. The SC waveform may include an SC-TD waveform or
an SC-FD waveform to achieve different performance tradeoffs.
However, permitting multiple different waveforms to be used (e.g.,
for downlink communications), such as an OFDM waveform, an SC-TD
waveform, and/or an SC-FD waveform, may lead to failed
communications between a UE and a base station without proper
coordination of which waveform is to be used. Furthermore, some
waveforms may be supported by some UEs and/or some base stations,
and may not be supported by other UEs and/or other base stations.
This may lead to incompatibilities between UEs and base stations
without proper communication of such capabilities.
[0051] Some techniques and apparatus described herein permit a base
station and a UE to coordinate the use of a waveform from multiple
waveform types, such as OFDM, SC-TD, SC-FD, and/or the like. Such
techniques and apparatuses may be applicable to an FR4 spectrum
and/or other frequency spectrums.
[0052] As indicated above, FIG. 3 is provided as an example. Other
examples may differ from what is described with respect to FIG.
3.
[0053] FIG. 4 is a diagram illustrating an example 400 of different
UE waveform capabilities and different base station waveform
capabilities, in accordance with various aspects of the present
disclosure.
[0054] As shown in FIG. 4, a UE and a base station can have a
variety of different waveform capabilities, such as using different
types of transmitters and/or receivers (e.g., as described below in
connection with FIG. 12). For example, as shown by reference number
405, a UE may have a capability to receive, but not to transmit,
communications on an initial BWP using an OFDM waveform (shown as
Init OFDM RX), and may have a capability to transmit and receive
subsequent communications on a wideband BWP using an SC-TD waveform
(shown as SC TD TX/RX) but not using an SC-FD waveform or an OFDM
waveform. This capability is shown as Init OFDM RX+SC-TD TX/RX. As
shown by reference number 410, a UE may have a capability to
transmit and receive communications on an initial BWP using an OFDM
waveform, and may have a capability to transmit and receive
subsequent communications on a wideband BWP using an SC-TD waveform
but not using an SC-FD waveform or an OFDM waveform. This
capability is shown as [Init OFDM+SC TD] TX/RX.
[0055] As shown by reference number 415, a UE may have a capability
to transmit and receive communications on an initial BWP using an
OFDM waveform, and may have a capability to transmit and receive
subsequent communications on a wideband BWP using an SC-TD waveform
and an SC-FD waveform but not using an OFDM waveform. This
capability is shown as [Init OFDM+SC TD & FD] TX/RX. As shown
by reference number 420, a UE may have a capability to transmit and
receive communications on an initial BWP using an OFDM waveform,
and may have a capability to transmit and receive subsequent
communications on a wideband BWP using an SC-TD waveform, an SC-FD
waveform, and an OFDM waveform. This capability is shown as [Full
OFDM+SC TD & FD] TX/RX. The UE capabilities shown in FIG. 4 are
provided as examples, and other UE capabilities may differ from
what is shown.
[0056] As shown by reference number 425, a base station (BS) may
have a capability to transmit, but not to receive, communications
on an initial BWP using an OFDM waveform (shown as Init OFDM TX),
and may have a capability to transmit and receive subsequent
communications on a wideband BWP using an SC-TD waveform (shown as
SC TD TX/RX) but not using an SC-FD waveform or an OFDM waveform.
This capability is shown as Init OFDM TX+SC-TD TX/RX. As shown by
reference number 430, a base station may have a capability to
transmit and receive communications on an initial BWP using an OFDM
waveform, and may have a capability to transmit and receive
subsequent communications on a wideband BWP using an SC-TD waveform
but not using an SC-FD waveform or an OFDM waveform. This
capability is shown as [Init OFDM+SC TD] TX/RX.
[0057] As shown by reference number 435, a base station may have a
capability to transmit and receive communications on an initial BWP
using an OFDM waveform, and may have a capability to transmit and
receive subsequent communications on a wideband BWP using an SC-TD
waveform and an SC-FD waveform but not using an OFDM waveform. This
capability is shown as [Init OFDM+SC TD & FD] TX/RX. As shown
by reference number 440, a base station may have a capability to
transmit and receive communications on an initial BWP using an OFDM
waveform, and may have a capability to transmit and receive
subsequent communications on a wideband BWP using an SC-TD
waveform, an SC-FD waveform, and an OFDM waveform. This capability
is shown as [Full OFDM+SC TD & FD] TX/RX. The base station
capabilities shown in FIG. 4 are provided as examples, and other
base station capabilities may differ from what is shown.
[0058] As further shown, in FIG. 4, different combinations of UE
capabilities and base station capabilities may permit network
procedures (e.g., communication of remaining minimum system
information (RMSI), a random access channel (RACH) procedure, a
radio resource control (RRC) procedure, and/or the like) to be
performed using different types of waveforms. For example, as shown
by reference number 445, some combinations of UE and base station
waveform capabilities may permit one or more default or minimum
capability procedures to be performed, which may include base
station transmission and UE reception of RMSI using either an SC-TD
waveform on a wideband BWP or an OFDM waveform on an initial BWP
(shown as RMSI on SC TD (or) Init-OFDM), and/or which may include
performing a RACH procedure and/or an RRC procedure using an SC-TD
waveform on a wideband BWP (shown as RACH/RRC on SC TD).
[0059] As shown by reference number 450, some combinations of UE
and base station waveform capabilities may permit the default or
minimum capability procedure(s) to be performed, and may also
permit the RACH procedure and/or the RRC procedure to be performed
using an OFDM waveform on an initial BWP (shown as +RACH/RRC on
Init-OFDM). As shown by reference number 455, some combinations of
UE and base station waveform capabilities may permit the default or
minimum capability procedure(s) to be performed, may permit the
RACH procedure and/or the RRC procedure to be performed using an
OFDM waveform on an initial BWP (shown as RACH/RRC on Init-OFDM),
and may permit the RACH procedure and/or the RRC procedure to be
performed using an SC-FD waveform on a wideband BWP (shown as
RACH/RRC on SC FD).
[0060] As shown by reference number 460, some combinations of UE
and base station waveform capabilities may permit the default or
minimum capability procedure(s) to be performed, may permit the
RACH procedure and/or the RRC procedure to be performed using an
OFDM waveform on an initial BWP (shown as RACH/RRC on Init-OFDM),
and may permit communication of RMSI using an SC-FD waveform on a
wideband BWP (shown as RMSI on SC FD). As shown by reference number
465, some combinations of UE and base station waveform capabilities
may permit the default or minimum capability procedure(s) to be
performed, may permit the RACH procedure and/or the RRC procedure
to be performed using an OFDM waveform on an initial BWP (shown as
RACH/RRC on Init-OFDM), may permit communication of RMSI using an
SC-FD waveform on a wideband BWP (shown as RMSI on SC FD), and may
permit the RACH procedure and/or the RRC procedure to be performed
using an SC-FD waveform on a wideband BWP (shown as RACH/RRC on SC
FD).
[0061] As shown by reference number 470, some combinations of UE
and base station waveform capabilities may permit the default or
minimum capability procedure(s) to be performed, may permit the
RACH procedure and/or the RRC procedure to be performed using an
OFDM waveform on an initial BWP, may permit communication of RMSI
using an SC-FD waveform or an OFDM waveform on a wideband BWP, and
may permit the RACH procedure and/or the RRC procedure to be
performed using an SC-FD waveform or an OFDM waveform on a wideband
BWP. In this case, the combination of capabilities may permit
communication between the UE and the base station (e.g., for
communication of RMSI, for a RACH procedure, for an RRC procedure,
and/or the like) using an OFDM waveform on an initial BWP, using an
SC-TD waveform on a wideband BWP, using an SC-FD waveform on a
wideband BWP, and using an OFDM waveform on a wideband BWP (shown
as "Any combination OK").
[0062] Permitting multiple different waveforms to be used (e.g., an
OFDM waveform, an SC-TD waveform, an SC-FD waveform, and/or the
like), depending on a combination of a UE waveform capability and a
base station waveform capability, may lead to failed communications
between a UE and a base station without proper coordination of
which waveform(s) are to be used for different network procedures
and/or for communication of different types of information. Some
techniques and apparatus described herein permit a base station and
a UE to coordinate the use of a waveform from multiple waveform
types, such as OFDM, SC-TD, SC-FD, and/or the like. Such techniques
and apparatuses may be applicable to an FR4 spectrum and/or other
frequency spectrums. In this way, a base station and a UE may be
capable of communicating using the same type of waveform.
[0063] As indicated above, FIG. 4 is provided as an example. Other
examples may differ from what is described with respect to FIG.
4.
[0064] FIG. 5 is a diagram illustrating an example 500 of waveform
capability indication, in accordance with various aspects of the
present disclosure. As shown in FIG. 5, a base station 110 and a UE
120 may communicate with one another. In some aspects, the base
station 110 is a serving base station that serves the UE 120.
[0065] As shown by reference number 505, the base station 110 may
transmit, and the UE 120 may receive, an indication of one or more
waveforms supported by the base station 110. As further shown, the
one or more waveforms include an OFDM waveform (e.g., for use on a
wideband BWP, since OFDM may always be used on an initial BWP), an
SC-FD waveform, and/or an SC-TD waveform. In some aspects, the
indication of the waveform(s) supported by the base station 110 may
be referred to as a base station waveform capability, a waveform
capability of the base station, and/or the like. In some aspects,
the indication may further indicate whether the one or more
waveforms, supported by the base station 110, are supported for
transmission (TX), for reception (RX), or for both transmission and
reception. For example, the base station 110 may indicate one or
more waveform capabilities described above in connection with FIG.
4 (e.g., in connection with reference numbers 425, 430, 435, and
440).
[0066] In some aspects, the base station 110 may use a signaling
message to transmit the indication of the base station waveform
capability (e.g., using an explicit indication in a field or an
information element (IE) in the signaling message). For example,
the base station 110 may transmit the indication in a physical
broadcast channel (PBCH) communication (e.g., a PBCH payload, an
SS/PBCH block, and/or the like), in RMSI, in other system
information (OSI), in an RRC message, in a medium access control
(MAC) control element (MAC-CE), in downlink control information
(DCI), and/or the like. A signaling message used to transmit the
indication may dictate the types of communications and/or network
procedures for which shared waveform support may be utilized. For
example, if the base station waveform capability is indicated in a
PBCH communication, then this may permit the UE 120 to determine a
waveform to be used to receive RMSI. However, if the base station
waveform capability is indicated in the RMSI, then a default
waveform may be used to receive RMSI (and the UE 120 may determine
a waveform to be used to perform a RACH procedure, an RRC
procedure, and/or the like).
[0067] Additionally, or alternatively, the base station 110 may
scramble and/or modify a signal to indicate the base station
waveform capability. For example, the base station 110 may scramble
or modify a primary synchronization signal (PSS), a secondary
synchronization signal (SSS), a PBCH demodulation reference signal
(DMRS), a PBCH cyclic redundancy check (CRC), a reference signal in
an SSB, and/or the like. For example, a first scrambling identity
or a first set of scrambling identities may indicate a first set of
waveforms (e.g., one or more waveforms) supported by the base
station 110, and a second scrambling identity or a second set of
scrambling identities may indicate a second set of waveforms (e.g.,
one or more waveforms) supported by the base station 110.
[0068] As shown by reference number 510, the UE 120 may determine
whether the UE 120 is capable of communicating with the base
station 110 based at least in part on the indication. In some
aspects, the UE 120 may determine whether the UE 120 and the base
station 110 both have a capability to communicate using a same type
of waveform, such as by comparing a UE waveform capability to the
received base station waveform capability. In some aspects, if at
least one waveform in the UE waveform capability matches a waveform
in the base station waveform capability, then the UE 120 may
determine that the UE 120 and the base station 110 are capable of
communicating with one another. In this case, the UE 120 may
determine at least one waveform, from one or more matching
waveforms, to be used for communications. In some aspects, if none
of the waveforms that the UE 120 is capable of using matches a
waveform indicated by the base station 110, then the UE 120 may
determine that the UE 120 and the base station 110 are not capable
of communicating with one another (e.g., on a wideband BWP). In
this case, the UE 120 may refrain from performing a network
procedure (e.g., obtaining RMSI, performing a RACH procedure,
performing an RRC procedure, and/or the like) with the base station
110.
[0069] As shown by reference number 515, the UE 120 may selectively
communicate with the base station 110 using at least one waveform
of the one or more waveforms. For example, if the UE 120 determines
that the UE 120 and the base station 110 are capable of
communicating with one another, then such communication may occur.
Conversely, if the UE 120 determines that the UE 120 and the base
station 110 are not capable of communicating with one another, then
such communication may not occur. In some aspects, if the UE 120
supports multiple waveforms that are also supported by the base
station 110, then the UE 120 may use blind decoding and/or
hypothesis detection to attempt to receive or decode communications
using one or more of the multiple waveforms.
[0070] In some aspects, the base station 110 may transmit a first
set of SSBs using the OFDM waveform and may transmit a second set
of SSBs using an SC waveform (e.g., one of the SC-FD waveform or
the SC-TD waveform). Additionally, or alternatively, the base
station 110 may transmit a first set of SSBs using the OFDM
waveform, may transmit a second set of SSBs using the SC-TD
waveform, and may transmit a third set of SSBs using the SC-FD
waveform. In this case, the base station 110 may indicate an SSB
transmission pattern (e.g., a set of time resources, frequency
resources, spatial resources, and/or the like) for the different
sets of SSBs in system information (e.g., for standalone mode) or
in an RRC message (e.g., for non-standalone mode). For example, the
base station 110 may indicate a first SSB transmission pattern for
SSBs transmitted using the OFDM waveform, may indicate a second SSB
transmission pattern for SSBs transmitted using the SC-TD waveform,
may indicate a third SSB transmission pattern for SSBs transmitted
using the SC-FD waveform, and/or the like. In this case, the UE 120
may determine an SSB transmission pattern for a waveform supported
by the UE 120 and the base station 110 (and/or a waveform selected
by the UE 120 in the case of multiple matching waveforms), and may
monitor for SSBs transmitted according to the SSB transmission
pattern for that waveform. Alternatively, the UE 120 may process
received SSBs using different waveform hypotheses (e.g., using
blind decoding and/or the like) to obtain the SSBs.
[0071] Additionally, or alternatively, the base station 110 may
transmit first RMSI using the OFDM waveform and may transmit second
RMSI using an SC waveform (e.g., one of the SC-FD waveform or the
SC-TD waveform). In some aspects, the base station 110 may transmit
first RMSI using the OFDM waveform, may transmit second RMSI using
the SC-TD waveform, and may transmit third RMSI using the SC-FD
waveform. In some aspects, the base station 110 may indicate an
RMSI transmission pattern (e.g., a set of time resources, frequency
resources, spatial resources, and/or the like) for the different
RMSI, in a similar manner as described above for SSBs. In this
case, the UE 120 may determine an RMSI transmission pattern for a
waveform supported by the UE 120 and the base station 110 (and/or a
waveform selected by the UE 120 in the case of multiple matching
waveforms), and may monitor for RMSI transmitted according to the
RMSI transmission pattern for that waveform. Alternatively, the UE
120 may process received RMSI using different waveform hypotheses
(e.g., using blind decoding and/or the like) to obtain the
RMSI.
[0072] In some aspects, the base station 110 may transmit a PBCH
payload using a first waveform. The PBCH payload may indicate a
location (e.g., a set of time resources, frequency resources,
spatial resources, and/or the like) of an SSB and/or of RMSI
transmitted using a second, different waveform. For example, the
base station 110 may transmit the PBCH payload using an OFDM
waveform (e.g., in an initial BWP, in an SS/PBCH block, and/or the
like), and the PBCH payload may indicate a location of an SSB (or a
set of SSBs) and/or RMSI transmitted using an SC waveform. In some
aspects, the PBCH payload may indicate a first location for SSBs
and/or RMSI transmitted using an SC-TD waveform and/or a second
location for SSBs and/or RMSI transmitted using an SC-FD waveform.
The location(s) may be indicated as an absolute location or a
relative location (e.g., an offset from the PBCH payload, an offset
from an SSB transmitted using the first waveform, and/or the like).
In this case, the UE 120 may receive the PBCH payload using the
first waveform, and may use the PBCH payload to determine a
location for one or more SSBs and/or RMSI transmitted using the
second waveform (and to obtain the SSB(s) and/or the RMSI).
[0073] In some aspects, the base station 110 may indicate (e.g.,
using RMSI and/or the like) a first set of RACH resources (e.g.,
time, frequency, and/or spatial resources) for the OFDM waveform
and a second set of RACH resources for an SC waveform (e.g., one of
the SC-FD waveform or the SC-TD waveform). Additionally, or
alternatively, the base station 110 may indicate a first set of
RACH resources for the OFDM waveform, a second set of RACH
resources for the SC-TD waveform, and a third set of RACH resources
for the SC-FD waveform. In this case, the UE 120 may use the
indication to determine a set of RACH resources to be used for a
waveform supported by the UE 120 and the base station 110 (and/or a
waveform selected by the UE 120 in the case of multiple matching
waveforms), and may transmit and/or receive RACH messages using the
set of RACH resources for that waveform.
[0074] In some aspects, the base station waveform capability may be
beam-specific. In this case, the base station 110 may indicate
different base station waveform capabilities for different beams
and/or different sets of beams. Additionally, or alternatively,
when the UE 120 switches beams (e.g., from a first beam that uses a
first waveform to a second beam that uses a second waveform), the
UE 120 may reset a MAC buffer and/or a radio link control (RLC)
buffer because different waveforms may support different payload
sizes.
[0075] By indicating a base station waveform capability in a
communication system (e.g., an NR system on an FR4 band) that
permits multiple different waveforms to be used (e.g., an OFDM
waveform, an SC-TD waveform, an SC-FD waveform, and/or the like),
network performance may be improved. For example, the base station
110 and the UE 120 may coordinate the use of a waveform that is
supported by both the base station 110 and the UE 120. Furthermore,
different waveforms may be selected in different scenarios, such as
for different network loads, different UE battery conditions,
and/or the like.
[0076] As indicated above, FIG. 5 is provided as an example. Other
examples may differ from what is described with respect to FIG.
5.
[0077] FIG. 6 is a diagram illustrating another example 600 of
waveform capability indication, in accordance with various aspects
of the present disclosure. As shown in FIG. 6, a serving base
station 110-1 and a UE 120 may communicate with one another. In
some aspects, the serving base station 110-1 may relay, to the UE
120, a base station waveform capability for a neighbor base station
110-2 (e.g., a neighbor base station waveform capability, as
opposed to a serving base station waveform capability described in
connection with FIG. 5). In some aspects, the neighbor base station
waveform capability may be used for base station (e.g., cell)
selection and/or handover.
[0078] As shown by reference number 605, the neighbor base station
110-2 may transmit, to the serving base station 110-1, an
indication of one or more waveforms supported by the neighbor base
station 110-2, in a similar manner as described above in connection
with FIG. 5. The one or more waveforms may include an OFDM waveform
(e.g., for use on a wideband BWP, since OFDM may always be used on
an initial BWP), an SC-FD waveform, and/or an SC-TD waveform. In
some aspects, the indication of the waveform(s) supported by the
neighbor base station 110-2 may be referred to as a neighbor base
station waveform capability, a waveform capability of the neighbor
base station, and/or the like. In some aspects, the indication may
further indicate whether the one or more waveforms, supported by
the neighbor base station 110-2, are supported for transmission
(TX), for reception (RX), or for both transmission and reception.
For example, the neighbor base station 110-2 may indicate one or
more waveform capabilities described above in connection with FIG.
4 (e.g., in connection with reference numbers 425, 430, 435, and
440).
[0079] In some aspects, the neighbor base station 110-2 may
indicate the one or more waveforms via a wired interface with the
serving base station 110-1. Additionally, or alternatively, the
neighbor base station 110-2 may indicate the one or more waveforms
via a wireless interface with the serving base station 110-1. For
example, the neighbor base station 110-2 may use a signaling
message to transmit the indication of the neighbor base station
waveform capability (e.g., using an explicit indication in a field
or an IE in the signaling message), and/or may scramble and/or
modify a signal to indicate the neighbor base station waveform
capability, in a similar manner as described above in connection
with FIG. 5.
[0080] As shown by reference number 610, the serving base station
110-1 may transmit, to the UE 120, an indication of the one or more
waveforms supported by the neighbor base station 110-2. The
indication may be transmitted in a signaling message and/or by
scrambling or modifying a signal, as described above.
[0081] As shown by reference number 615, the UE 120 may determine
whether the UE 120 is capable of communicating with the neighbor
base station 110-2 based at least in part on the indication, in a
similar manner as described above in connection with FIG. 5. As
shown by reference number 620, the UE 120 may selectively
communicate with the neighbor base station 110-2 using at least one
waveform of the one or more waveforms, in a similar manner as
described above in connection with FIG. 5. As further shown, the UE
120 may determine whether to select the neighbor base station 110-2
(e.g., for a handover).
[0082] In some aspects, the UE 120 may determine whether to select
the neighbor base station 110-2 based at least in part on whether
the UE 120 is capable of communicating with the neighbor base
station 110-2. For example, the UE 120 may determine whether the UE
120 and the neighbor base station 110-2 both have a capability to
communicate using a same type of waveform, such as by comparing a
UE waveform capability to the received neighbor base station
waveform capability. In some aspects, if at least one waveform in
the UE waveform capability matches a waveform in the neighbor base
station waveform capability, then the UE 120 may determine that the
UE 120 and the neighbor base station 110-2 are capable of
communicating with one another. In this case, the UE 120 may
determine at least one waveform, from one or more matching
waveforms, to be used for communications, and/or the UE 120 may
select the neighbor base station 110-2 for a handover (or may
include the neighbor base station 110-2 in a list of candidates for
selection). In some aspects, if none of the waveforms that the UE
120 is capable of using match a waveform indicated by the neighbor
base station 110-2, then the UE 120 may determine that the UE 120
and the neighbor base station 110-2 are not capable of
communicating with one another (e.g., on a wideband BWP). In this
case, the UE 120 may refrain from performing a network procedure
(e.g., cell selection, handover, and/or the like) with the neighbor
base station 110-2. For example, the UE 120 may refrain from
selecting the neighbor base station 110-2 and/or may exclude the
neighbor base station 110-2 from a list of candidates for cell
selection.
[0083] Additionally, or alternatively, the UE 120 may select a
neighbor base station, from a set of candidate neighbor base
stations, based at least in part on comparing neighbor base station
waveform capabilities of the set of neighbor base stations. For
example, if a first neighbor base station supports a higher
waveform capability (e.g., an OFDM waveform on a wideband BWP) than
a second neighbor base station, then the UE 120 may select and/or
prioritize the first neighbor base station. Additionally, or
alternatively, the UE 120 may select and/or prioritize a first
neighbor base station that supports a greater number of waveforms
that are also supported by the UE 120 as compared to a second
neighbor base station that supports a smaller number of waveforms
that are also supported by the UE 120. In this way, cell selection
may be improved by ensuring that a UE 120 selects a neighbor base
station 110-2 that is compatible with the UE 120 with respect to
supported waveform(s).
[0084] As indicated above, FIG. 6 is provided as an example. Other
examples may differ from what is described with respect to FIG.
6.
[0085] FIG. 7 is a diagram illustrating another example 700 of
waveform capability indication, in accordance with various aspects
of the present disclosure. As shown in FIG. 7, a base station 110
and a UE 120 may communicate with one another. In some aspects, the
base station 110 is a serving base station that serves the UE
120.
[0086] As shown by reference number 705, the UE 120 may transmit,
and the base station 110 may receive, an indication of one or more
waveforms supported by the UE 120. As further shown, the one or
more waveforms include an OFDM waveform (e.g., for use on a
wideband BWP, since OFDM may always be used on an initial BWP), an
SC-FD waveform, and/or an SC-TD waveform. In some aspects, the
indication of the waveform(s) supported by the UE 120 may be
referred to as a UE waveform capability, a waveform capability of
the UE, and/or the like. In some aspects, the indication may
further indicate whether the one or more waveforms, supported by
the UE 120, are supported for transmission (TX), for reception
(RX), or for both transmission and reception. For example, the UE
120 may indicate one or more waveform capabilities described above
in connection with FIG. 4 (e.g., in connection with reference
numbers 425, 430, 435, and 440).
[0087] In some aspects, the UE 120 may transmit the UE waveform
capability in a UE capability report. For example, the UE 120 may
transmit the UE waveform capability in a UE capability information
message associated with initial network registration, in a UE
capability report associated with an RRC procedure, and/or the
like. In some aspects, when a UE 120 powers on and registers with a
network (e.g., a core network, such as via an access and mobility
function (AMF) device), the network may enquire about one or more
UE capabilities. In this case, the UE 120 may receive a UE
capability enquiry from the AMF device (via the base station 110),
and may indicate the UE waveform capability to the AMF device (via
the base station 110) in a response to the UE capability enquiry
(e.g., in a UE capability information message). In some aspects,
the AMF device may transmit a message to the base station 110 to
notify the base station 110 of the UE waveform capability.
[0088] Additionally, or alternatively, the UE 120 may transmit the
UE waveform capability to the base station 110 in an RRC message.
For example, the UE 120 may indicate the UE waveform capability in
a UE capability report transmitted in association with an RRC
connection setup procedure. In this case, the base station 110 may
request the UE capability report, and the UE 120 may transmit the
UE capability report, which may include the UE waveform capability.
In some aspects, this technique may be used to report the UE
waveform capability when the UE 120 is in an RRC connected mode
and/or in association with performing an RRC procedure to enter the
RRC connected mode. In some aspects, this technique may be used
based at least in part on a determination that the UE capability
enquiry described above was not performed as part of initial
network access.
[0089] Additionally, or alternatively, the UE 120 may indicate the
UE waveform capability using a RACH message. For example, the base
station 110 may indicate (e.g., using RMSI and/or the like) a first
set of RACH resources (e.g., time, frequency, and/or spatial
resources) for a first waveform (e.g., the OFDM waveform) and a
second set of RACH resources for a second waveform (e.g., an SC
waveform, such as one of the SC-FD waveform or the SC-TD waveform).
Additionally, or alternatively, the base station 110 may indicate a
first set of RACH resources for the OFDM waveform, a second set of
RACH resources for the SC-TD waveform, and a third set of RACH
resources for the SC-FD waveform. In this case, the UE 120 may use
the indication to determine a set of RACH resources to be used for
a waveform supported by the UE 120 and the base station 110 (and/or
a waveform selected by the UE 120 in the case of multiple matching
waveforms), and may transmit a RACH message using the set of RACH
resources for that waveform. In this case, the base station 110 may
determine a waveform to be used to communicate with the UE 120
based at least in part on the set of RACH resources via which a
RACH message is received from the UE 120 and a waveform
corresponding to that set of RACH resources, as indicated by the
base station 110 to the UE 120. Additionally, or alternatively, the
UE 120 may explicitly indicate the UE waveform capability in a RACH
message, such as RACH Msg A (e.g., in a RACH payload), RACH Msg 3,
and/or another RACH message transmitted by the UE 120 to the base
station 110.
[0090] As shown by reference number 710, the base station 110 may
determine whether the base station 110 is capable of communicating
with the UE 120 based at least in part on the indication. In some
aspects, the base station 110 may determine whether the UE 120 and
the base station 110 both have a capability to communicate using a
same type of waveform, such as by comparing a base station waveform
capability to the received UE waveform capability. In some aspects,
if at least one waveform in the base station waveform capability
matches a waveform in the UE waveform capability, then the base
station 110 may determine that the UE 120 and the base station 110
are capable of communicating with one another. In this case, the
base station 110 may determine at least one waveform, from one or
more matching waveforms, to be used for communications. In some
aspects, if none of the waveforms that the base station 110 is
capable of using matches a waveform indicated by the UE 120, then
the base station 110 may determine that the UE 120 and the base
station 110 are not capable of communicating with one another
(e.g., on a wideband BWP). In this case, the base station 110 may
refrain from performing a network procedure (e.g., transmitting
RMSI, performing a RACH procedure, performing an RRC procedure,
and/or the like) with the UE 120. In some aspects, the base station
110 may reject an access request from the UE 120 based at least in
part on determining that the UE 120 and the base station 110 are
not capable of communicating with one another (e.g., on a wideband
BWP).
[0091] As shown by reference number 715, the base station 110 may
selectively communicate with the UE 120 using at least one waveform
of the one or more waveforms. For example, if the base station 110
determines that the UE 120 and the base station 110 are capable of
communicating with one another, then such communication may occur.
Conversely, if the base station 110 determines that the UE 120 and
the base station 110 are not capable of communicating with one
another, then such communication may not occur. In some aspects, if
the base station 110 supports multiple waveforms that are also
supported by the UE 120, then the base station 110 may use blind
decoding and/or hypothesis detection to attempt to receive or
decode communications using one or more of the multiple
waveforms.
[0092] By indicating a UE waveform capability in a communication
system (e.g., an NR system on an FR4 band) that permits multiple
different waveforms to be used (e.g., an OFDM waveform, an SC-TD
waveform, an SC-FD waveform, and/or the like), network performance
may be improved. For example, the base station 110 and the UE 120
may coordinate the use of a waveform that is supported by both the
base station 110 and the UE 120. Furthermore, different waveforms
may be selected in different scenarios, such as for different
network loads, different UE battery conditions, and/or the
like.
[0093] As indicated above, FIG. 7 is provided as an example. Other
examples may differ from what is described with respect to FIG.
7.
[0094] FIG. 8 is a diagram illustrating another example 800 of
waveform capability indication, in accordance with various aspects
of the present disclosure. As shown in FIG. 8, a serving base
station 110-1 and a UE 120 may communicate with one another. In
some aspects, the serving base station 110-1 may relay, to a
neighbor base station 110-2, a UE waveform capability for the UE
120. In some aspects, the UE waveform capability may be used by the
neighbor base station 110-2 to admit or reject the UE 120 for
network access.
[0095] As shown by reference number 805, the UE 120 may transmit,
to the serving base station 110-1, an indication of one or more
waveforms supported by the UE 120, in a similar manner as described
above in connection with FIG. 7. As shown by reference number 810,
the serving base station 110-1 may transmit, to the neighbor base
station 110-2, an indication of the one or more waveforms supported
by the UE 120. In some aspects, the serving base station 110-1 may
indicate the one or more waveforms via a wired interface with the
neighbor base station 110-2. Additionally, or alternatively, the
serving base station 110-1 may indicate the one or more waveforms
via a wireless interface with the neighbor base station 110-2. For
example, the serving base station 110-1 may use a signaling message
to transmit the indication of the UE waveform capability (e.g.,
using an explicit indication in a field or an IE in the signaling
message), and/or may scramble and/or modify a signal to indicate
the UE station waveform capability, in a similar manner as
described above in connection with FIG. 5. In some aspects, this
technique of indicating a UE waveform capability from a first base
station 110 to a second base station 110 may be used when the UE
120 is in an RRC inactive mode.
[0096] In some aspects, the indication may be transmitted directly
between base stations 110. Alternatively, the indication may be
transmitted between base stations 110 via an AMF device (e.g., to
one or more base stations 110 within a radio access network (RAN)
notification area associated with the AMF device). Additionally, or
alternatively, when the UE 120 moves to a new RAN notification area
(e.g., in an RRC idle mode) a first AMF device, associated with a
prior RAN notification area from which the UE 120 has moved, may
indicate the UE waveform capability to a second AMF device
associated with a new RAN notification area to which the UE 120 has
moved. The second AMF device may transmit a message indicating the
UE waveform capability to one or more base stations 110 in the new
RAN notification area.
[0097] As shown by reference number 815, the neighbor base station
110-2 may admit or reject the UE 120 (e.g., as part of a handover
procedure, as part of a cell selection procedure, as part of a
network access procedure, in a response to an access request from
the UE 120, and/or the like) based at least in part on the UE
waveform capability. In some aspects, the neighbor base station
110-2 may admit or reject the UE 120 based at least in part on the
UE waveform capability and a neighbor base station waveform
capability of the neighbor base station 110-2.
[0098] In some aspects, the neighbor base station 110-2 may
determine whether to admit or reject the UE 120 based at least in
part on whether the neighbor base station 110-2 is capable of
communicating with the UE 120. For example, the neighbor base
station 110-2 may determine whether the UE 120 and the neighbor
base station 110-2 both have a capability to communicate using a
same type of waveform, such as by comparing the received UE
waveform capability and the neighbor base station waveform
capability. In some aspects, if at least one waveform in the UE
waveform capability matches a waveform in the neighbor base station
waveform capability, then the neighbor base station 110-2 may
determine that the UE 120 and the neighbor base station 110-2 are
capable of communicating with one another. In this case, the
neighbor base station 110-2 may determine at least one waveform,
from one or more matching waveforms, to be used for communications,
and/or the neighbor base station 110-2 may admit the UE 120. In
some aspects, if none of the waveforms that the UE 120 is capable
of using matches a waveform supported by the neighbor base station
110-2, then the neighbor base station 110-2 may determine that the
UE 120 and the neighbor base station 110-2 are not capable of
communicating with one another (e.g., on a wideband BWP). In this
case, the neighbor base station 110-2 may reject the UE 120. In
this way, network resources and resources of the neighbor base
station 110-2 and the UE 120 (e.g., processing resources, memory
resources, battery power, and/or the like) may be conserved by
preventing a UE 120 from accessing the neighbor base station 110-2
unless the UE 120 and the neighbor base station 110-2 have shared
waveform compatibility.
[0099] In some aspects, if the neighbor base station 110-2
determines to admit the UE 120, then the neighbor base station
110-2 may indicate a waveform to be used for communications between
the UE 120 and the neighbor base station 110-2. For example, in a
handover scenario, after being notified of the UE waveform
capability by the serving base station 110-1, the neighbor base
station 110-2 may indicate, to the serving base station 110-1, a
waveform to be used for communications between the neighbor base
station 110-2 and the UE 120 (e.g., during and/or after handover).
In some aspects, the neighbor base station 110-2 may determine the
waveform based at least in part on the UE waveform capability and
the neighbor base station waveform capability (e.g., to determine a
compatible waveform, a compatible waveform with the best
performance as compared to other compatible waveforms, and/or the
like). In some aspects, the neighbor base station 110-2 may
indicate the waveform to the serving base station 110-1 in an
acknowledgement (ACK) message in response to receiving the UE
waveform capability from the serving base station 110-1. The
serving base station 110-1 may relay the waveform, selected and
indicated by the neighbor base station 110-2, to the UE 120. The UE
120 may then use this waveform to communicate with the neighbor
base station 110-2 (e.g., during and/or after handover). In this
way, resources may be conserved that would otherwise be wasted by
attempting communications using incompatible waveforms and/or a
sub-optimal waveform.
[0100] As indicated above, FIG. 8 is provided as an example. Other
examples may differ from what is described with respect to FIG.
8.
[0101] FIG. 9 is a diagram illustrating another example 900 of
waveform capability indication, in accordance with various aspects
of the present disclosure. As shown in FIG. 9, a base station 110
and a UE 120 may communicate with one another. In some aspects, the
base station 110 is a serving base station that serves the UE
120.
[0102] As shown by reference number 905, the base station 110 may
transmit, and the UE 120 may receive, a configuration that
indicates a first set of resources (e.g., time, frequency, and/or
spatial resources) to be used for paging messages transmitted using
a first waveform (e.g., an OFDM waveform) and a second set of
resources to be used for paging messages transmitted using a second
waveform (e.g., an SC waveform, such as an SC-FD waveform and/or an
SC-TD waveform). Additionally, or alternatively, the base station
110 may indicate a first set of resources to be used for paging
messages transmitted using the OFDM waveform, a second set of
resources to be used for paging messages transmitted using the
SC-TD waveform, and a third set of resources to be used for paging
messages transmitted using the SC-FD waveform. In this case, the UE
120 may use the indication to determine a set of resources to be
monitored by the UE 120 for paging messages transmitted using a
waveform supported by the UE 120 (and/or a waveform selected by the
UE 120 in the case of multiple matching waveforms), and may monitor
for and/or receive paging messages using the set of resources for
that waveform.
[0103] As shown by reference number 910, the base station 110 may
transmit a paging message on one or more sets of resources
according to the sets of resources indicated to the UE 120 in the
configuration described above. In some aspects, the base station
110 may determine which sets of resources to use to transmit the
paging message based at least in part on whether the base station
110 has received an indication of one or more waveforms supported
by the UE 120. For example, if the base station 110 has received a
UE waveform capability of the UE 120, then the base station 110 may
transmit the paging message on only the set(s) of resources
corresponding to the waveform(s) supported by the UE 120.
Alternatively, if the base station 110 has not received a UE
waveform capability of the UE 120, then the base station 110 may
transmit the paging message on all sets of resources (e.g.,
corresponding to all waveforms). In some aspects, if the paging
message is an emergency message (e.g., a public warning system
(PWS) message, a wireless emergency alert (WEA) message, a
commercial mobile alert system (CMAS) message, an earthquake and
tsunami warning system (ETWS) message, a presidential level alert
message, and/or the like) and/or a message indicating a change in
system information, then the base station 110 may transmit the
paging message on all sets of resources (e.g., corresponding to all
waveforms) to reduce the likelihood that such a message is
missed.
[0104] In some aspects, different sets of resources, corresponding
to different waveforms, may be associated with different channels.
For example, a first set of resources (e.g., for an OFDM waveform)
may be associated with a first channel (e.g., a control channel,
such as a physical downlink control channel (PDCCH)), and a second
set of resources (e.g., for an SC waveform, such as an SC-TD
waveform or an SC-FD waveform) may be associated with a second
channel (e.g., a data channel, such as a physical downlink shared
channel (PDSCH)). Additionally, or alternatively, different sets of
resources may be configured on the second channel (e.g., the data
channel) for different waveforms. For example, a set of resources
on the data channel may be configured for paging messages using the
SC-TD waveform, and another set of resources on the data channel
may be configured for paging messages using the SC-FD waveform.
[0105] As shown by reference number 915, the UE 120 may monitor one
or more of the indicated sets of resources based at least in part
on the UE waveform capability. For example, the UE 120 may monitor
only the sets of resources that correspond to a waveform supported
by the UE 120. In some aspects, if the UE 120 is capable of
communicating using multiple waveforms, the UE 120 may select one
of the multiple waveforms, and may monitor for paging messages on
only the set of resources corresponding to the selected waveform
(e.g., to conserve resources of the UE 120). Alternatively, if the
UE 120 is capable of communicating using multiple waveforms, the UE
120 may monitor for paging messages on multiple sets of resources
corresponding to the multiple waveforms (e.g., to increase a
likelihood of successfully receiving a paging message).
[0106] As indicated above, FIG. 9 is provided as an example. Other
examples may differ from what is described with respect to FIG.
9.
[0107] FIG. 10 is a diagram illustrating an example process 1000
performed, for example, by a UE, in accordance with various aspects
of the present disclosure. Example process 1000 is an example where
a UE (e.g., UE 120 and/or the like) performs operations associated
with waveform capability indication.
[0108] As shown in FIG. 10, in some aspects, process 1000 may
include receiving an indication of one or more waveforms supported
by a base station, wherein the one or more waveforms include at
least one of an orthogonal frequency division multiplexing (OFDM)
waveform, a single carrier frequency domain (SC-FD) waveform, or a
single carrier time domain (SC-TD) waveform (block 1010). For
example, the UE (e.g., using receive processor 258,
controller/processor 280, memory 282, and/or the like) may receive
an indication of one or more waveforms supported by a base station,
as described above. In some aspects, the one or more waveforms
include at least one of an OFDM waveform, an SC-FD waveform, or an
SC-TD waveform.
[0109] As further shown in FIG. 10, in some aspects, process 1000
may include determining whether the UE is capable of communicating
with the base station based at least in part on the indication
(block 1020). For example, the UE (e.g., using controller/processor
280, memory 282, and/or the like) may determine whether the UE is
capable of communicating with the base station based at least in
part on the indication, as described above.
[0110] As further shown in FIG. 10, in some aspects, process 1000
may include selectively communicating with the base station using
at least one waveform of the one or more waveforms based at least
in part on the determination (block 1030). For example, the UE
(e.g., using receive processor 258, transmit processor 264,
controller/processor 280, memory 282, and/or the like) may
selectively communicate with the base station using at least one
waveform of the one or more waveforms based at least in part on the
determination, as described above.
[0111] Process 1000 may include additional aspects, such as any
single aspect or any combination of aspects described below and/or
in connection with one or more other processes described elsewhere
herein.
[0112] In a first aspect, the indication further indicates whether
the one or more waveforms are supported for transmission, for
reception, or for both transmission and reception.
[0113] In a second aspect, alone or in combination with the first
aspect, the indication is received in at least one of a physical
broadcast channel communication, remaining minimum system
information, other system information, a radio resource control
message, a medium access control (MAC) control element, downlink
control information, or a combination thereof.
[0114] In a third aspect, alone or in combination with one or more
of the first and second aspects, the indication is received via a
signal that is scrambled or modified to indicate the one or more
waveforms.
[0115] In a fourth aspect, alone or in combination with one or more
of the first through third aspects, the signal includes at least
one of a primary synchronization signal, a secondary
synchronization signal, a physical broadcast channel demodulation
reference signal, a physical broadcast channel cyclic redundancy
check, a reference signal in a synchronization signal block, or a
combination thereof.
[0116] In a fifth aspect, alone or in combination with one or more
of the first through fourth aspects, process 1000 includes
monitoring for at least one of a first set of synchronization
signal blocks transmitted using the OFDM waveform or a second set
of synchronization signal blocks transmitted using at least one of
the SC-FD waveform or the SC-TD waveform.
[0117] In a sixth aspect, alone or in combination with one or more
of the first through fifth aspects, process 1000 includes
monitoring for at least one of first remaining minimum system
information transmitted using the OFDM waveform or second remaining
minimum system information transmitted using at least one of the
SC-FD waveform or the SC-TD waveform.
[0118] In a seventh aspect, alone or in combination with one or
more of the first through sixth aspects, a PBCH payload indicates a
location of at least one of a synchronization signal block or
remaining minimum system information transmitted using a second
waveform of the OFDM waveform or the at least one of the SC-FD
waveform or the SC-TD waveform.
[0119] In an eighth aspect, alone or in combination with one or
more of the first through seventh aspects, process 1000 includes
receiving remaining minimum system information that indicates a
first set of random access channel (RACH) resources for the OFDM
waveform and a second set of RACH resources for at least one of the
SC-FD waveform or the SC-TD waveform.
[0120] In a ninth aspect, alone or in combination with one or more
of the first through eighth aspects, the one or more waveforms
supported by the UE include at least one of the OFDM waveform, the
SC-FD waveform, or the SC-TD waveform.
[0121] In a tenth aspect, alone or in combination with one or more
of the first through ninth aspects, the one or more waveforms
supported by the UE are indicated using at least one of: a UE
capability information message associated with initial network
registration, a UE capability report associated with a radio
resource control procedure, a random access procedure (RACH)
message, or a combination thereof.
[0122] In an eleventh aspect, alone or in combination with one or
more of the first through tenth aspects, the one or more waveforms
supported by the UE are indicated using the RACH message based at
least in part on a set of resources used by the UE to transmit the
RACH message, wherein a first set of resources for the RACH message
indicates the OFDM waveform and a second set of resources for the
RACH message indicates at least one of the SC-FD waveform or the
SC-TD waveform.
[0123] In a twelfth aspect, alone or in combination with one or
more of the first through eleventh aspects, process 1000 includes
receiving a configuration that indicates a first set of resources
to be used for paging messages transmitted using the OFDM waveform
and a second set of resources to be used for paging messages
transmitted using at least one of the SC-FD waveform or the SC-TD
waveform.
[0124] In a thirteenth aspect, alone or in combination with one or
more of the first through twelfth aspects, process 1000 includes
monitoring at least one of the first set of resources or the second
set of resources based at least in part on one or more waveforms
supported by the UE.
[0125] In a fourteenth aspect, alone or in combination with one or
more of the first through thirteenth aspects, the first set of
resources are associated with a first channel and the second set of
resources are associated with a second channel.
[0126] In a fifteenth aspect, alone or in combination with one or
more of the first through fourteenth aspects, the first channel is
a control channel and the second channel is a data channel.
[0127] In a sixteenth aspect, alone or in combination with one or
more of the first through fifteenth aspects, the base station is a
serving base station that serves the UE.
[0128] In a seventeenth aspect, alone or in combination with one or
more of the first through sixteenth aspects, the base station is a
neighbor base station.
[0129] In an eighteenth aspect, alone or in combination with one or
more of the first through seventeenth aspects, process 1000
includes selecting the neighbor base station for handover based at
least in part on the one or more waveforms supported by the
neighbor base station.
[0130] In a nineteenth aspect, alone or in combination with one or
more of the first through eighteenth aspects, the one or more
waveforms are beam-specific, and the UE is configured to reset at
least one of a media access control buffer or a radio link control
buffer when the UE switches from a first beam to a second beam.
[0131] Although FIG. 10 shows example blocks of process 1000, in
some aspects, process 1000 may include additional blocks, fewer
blocks, different blocks, or differently arranged blocks than those
depicted in FIG. 10. Additionally, or alternatively, two or more of
the blocks of process 1000 may be performed in parallel.
[0132] FIG. 11 is a diagram illustrating an example process 1100
performed, for example, by a base station, in accordance with
various aspects of the present disclosure. Example process 1100 is
an example where a base station (e.g., base station 110 and/or the
like) performs operations associated with waveform capability
indication.
[0133] As shown in FIG. 11, in some aspects, process 1100 may
include transmitting an indication of one or more waveforms
supported by the base station, wherein the one or more waveforms
include at least one of an OFDM waveform, an SC-FD waveform, or an
SC-TD waveform (block 1110). For example, the base station (e.g.,
using transmit processor 220, controller/processor 240, memory 242,
and/or the like) may transmit an indication of one or more
waveforms supported by the base station, as described above. In
some aspects, the one or more waveforms include at least one of an
OFDM waveform, an SC-FD waveform, or an SC-TD waveform.
[0134] As further shown in FIG. 11, in some aspects, process 1100
may include communicating with a UE using at least one waveform of
the one or more waveforms (block 1120). For example, the base
station (e.g., using transmit processor 220, receive processor 238,
controller/processor 240, memory 242, and/or the like) may
communicate with a UE using at least one waveform of the one or
more waveforms, as described above.
[0135] Process 1100 may include additional aspects, such as any
single aspect or any combination of aspects described below and/or
in connection with one or more other processes described elsewhere
herein.
[0136] In a first aspect, the indication is transmitted in at least
one of a physical broadcast channel communication, remaining
minimum system information, other system information, a radio
resource control message, a medium access control (MAC) control
element, downlink control information, or a combination
thereof.
[0137] In a second aspect, alone or in combination with the first
aspect, the indication is transmitted using a signal that is
scrambled or modified to indicate the one or more waveforms.
[0138] In a third aspect, alone or in combination with one or more
of the first and second aspects, the signal includes at least one
of a primary synchronization signal, a secondary synchronization
signal, a physical broadcast channel demodulation reference signal,
a physical broadcast channel cyclic redundancy check, a reference
signal in a synchronization signal block, or a combination
thereof.
[0139] In a fourth aspect, alone or in combination with one or more
of the first through third aspects, process 1100 includes
transmitting a first set of synchronization signal blocks using the
OFDM waveform and a second set of synchronization signal blocks
using at least one of the SC-FD waveform or the SC-TD waveform.
[0140] In a fifth aspect, alone or in combination with one or more
of the first through fourth aspects, process 1100 includes
transmitting first remaining minimum system information using the
OFDM waveform and second remaining minimum system information using
at least one of the SC-FD waveform or the SC-TD waveform.
[0141] In a sixth aspect, alone or in combination with one or more
of the first through fifth aspects, the PBCH payload indicates a
location of at least one of a synchronization signal block or
remaining minimum system information that is transmitted using a
second waveform of the OFDM waveform or the at least one of the
SC-FD waveform or the SC-TD waveform.
[0142] In a seventh aspect, alone or in combination with one or
more of the first through sixth aspects, process 1100 includes
transmitting remaining minimum system information that indicates a
first set of random access channel (RACH) resources for the OFDM
waveform and a second set of RACH resources for at least one of the
SC-FD waveform or the SC-TD waveform.
[0143] In an eighth aspect, alone or in combination with one or
more of the first through seventh aspects, the one or more
waveforms supported by the UE include at least one of the OFDM
waveform, the SC-FD waveform, or the SC-TD waveform.
[0144] In a ninth aspect, alone or in combination with one or more
of the first through eighth aspects, the one or more waveforms
supported by the UE are indicated using at least one of: a UE
capability information message associated with initial network
registration, a UE capability report associated with a radio
resource control procedure, a RACH message, a message received from
another base station, a message received from an access and
mobility function device, or a combination thereof.
[0145] In a tenth aspect, alone or in combination with one or more
of the first through ninth aspects, the one or more waveforms
supported by the UE are indicated using the RACH message based at
least in part on a set of resources used by the UE to transmit the
RACH message, wherein a first set of resources for the RACH message
indicates the OFDM waveform and a second set of resources for the
RACH message indicates at least one of the SC-FD waveform or the
SC-TD waveform.
[0146] In an eleventh aspect, alone or in combination with one or
more of the first through tenth aspects, process 1100 includes
transmitting an indication of the one or more waveforms supported
by the UE to a neighbor base station.
[0147] In a twelfth aspect, alone or in combination with one or
more of the first through eleventh aspects, the one or more
waveforms supported by the UE are used by the neighbor base station
for admission or rejection of access for the UE.
[0148] In a thirteenth aspect, alone or in combination with one or
more of the first through twelfth aspects, process 1100 includes
transmitting a configuration that indicates a first set of
resources to be used for paging messages transmitted using the OFDM
waveform and a second set of resources to be used for paging
messages transmitted using at least one of the SC-FD waveform or
the SC-TD waveform.
[0149] In a fourteenth aspect, alone or in combination with one or
more of the first through thirteenth aspects, process 1100 includes
transmitting a paging message on the first set of resources, the
second set of resources, or both the first set of resources and the
second set of resources based at least in part on whether the base
station has received an indication of one or more waveforms
supported by the UE.
[0150] In a fifteenth aspect, alone or in combination with one or
more of the first through fourteenth aspects, a paging message is
transmitted on both the first set of resources or the second set of
resources based at least in part on a determination that the paging
message is an emergency message or a message that indicates a
change in system information.
[0151] In a sixteenth aspect, alone or in combination with one or
more of the first through fifteenth aspects, the first set of
resources are associated with a first channel and the second set of
resources are associated with a second channel.
[0152] In a seventeenth aspect, alone or in combination with one or
more of the first through sixteenth aspects, the first channel is a
control channel and the second channel is a data channel.
[0153] In an eighteenth aspect, alone or in combination with one or
more of the first through seventeenth aspects, process 1100
includes receiving an indication of one or more waveforms supported
by a neighbor base station; and transmitting, to the UE, an
indication of the one or more waveforms supported by the neighbor
base station.
[0154] Although FIG. 11 shows example blocks of process 1100, in
some aspects, process 1100 may include additional blocks, fewer
blocks, different blocks, or differently arranged blocks than those
depicted in FIG. 11. Additionally, or alternatively, two or more of
the blocks of process 1100 may be performed in parallel.
[0155] FIG. 12 is a diagram illustrating an example of a
transmitter architecture and a receiver architecture for
transmitting or receiving different waveforms, in accordance with
various aspects of the present disclosure.
[0156] As shown in FIG. 12, an SC waveform transmitter capable of
transmitting an SC-FD waveform (e.g., a DFT-based waveform) may
include a constellation mapping component, a DFT (of size K)
component, a tone mapping component, an FFT (of size N) component,
a cyclic prefix insertion component, and a frequency equalization
(FE) processing component (e.g., a Tx FE processing component).
[0157] As further shown, an SC waveform transmitter capable of
transmitting an SC-TD waveform may include a constellation mapping
component, a cyclic prefix insertion component (e.g., to enable
frequency domain equalization (FDE)), an up-sampling and pulse
shaping component, and an FE processing component (e.g., a Tx FE
processing component). Notably, a DFT (of size K) component, a tone
mapping component, and an FFT (of size N) component may not be used
to generate SC-TD waveforms.
[0158] As further shown, an SC waveform receiver capable of
receiving an SC-FD waveform (e.g., a DFT-based waveform) may
include an FE processing component (e.g., an Rx FE processing
component), a cyclic prefix removal component, an FFT (of size N)
component, a tone demapping component, an FDE component, a DFT (of
size K) component, and a constellation demapping component.
[0159] As further shown, an SC waveform receiver capable of
receiving an SC-TD waveform may include an FE processing component
(e.g., an Rx FE processing component), a down-sampling and match
filtering component, a time domain equalization (TDE) component, a
cyclic prefix removal component (e.g., to enable FDE), and a
constellation demapping component. Notably, a DFT (of size K)
component, a tone demapping component, and an FFT (of size N)
component may not be used to receive SC-TD waveforms.
[0160] As indicated above, FIG. 12 is provided as an example. Other
examples may differ from what is described with respect to FIG.
12.
[0161] The foregoing disclosure provides illustration and
description, but is not intended to be exhaustive or to limit the
aspects to the precise form disclosed. Modifications and variations
may be made in light of the above disclosure or may be acquired
from practice of the aspects.
[0162] As used herein, the term "component" is intended to be
broadly construed as hardware, firmware, and/or a combination of
hardware and software. As used herein, a processor is implemented
in hardware, firmware, and/or a combination of hardware and
software.
[0163] As used herein, satisfying a threshold may, depending on the
context, refer to a value being greater than the threshold, greater
than or equal to the threshold, less than the threshold, less than
or equal to the threshold, equal to the threshold, not equal to the
threshold, and/or the like.
[0164] It will be apparent that systems and/or methods described
herein may be implemented in different forms of hardware, firmware,
and/or a combination of hardware and software. The actual
specialized control hardware or software code used to implement
these systems and/or methods is not limiting of the aspects. Thus,
the operation and behavior of the systems and/or methods were
described herein without reference to specific software code--it
being understood that software and hardware can be designed to
implement the systems and/or methods based, at least in part, on
the description herein.
[0165] Even though particular combinations of features are recited
in the claims and/or disclosed in the specification, these
combinations are not intended to limit the disclosure of various
aspects. In fact, many of these features may be combined in ways
not specifically recited in the claims and/or disclosed in the
specification. Although each dependent claim listed below may
directly depend on only one claim, the disclosure of various
aspects includes each dependent claim in combination with every
other claim in the claim set. A phrase referring to "at least one
of" a list of items refers to any combination of those items,
including single members. As an example, "at least one of: a, b, or
c" is intended to cover a, b, c, a-b, a-c, b-c, and a-b-c, as well
as any combination with multiples of the same element (e.g., a-a,
a-a-a, a-a-b, a-a-c, a-b-b, a-c-c, b-b, b-b-b, b-b-c, c-c, and
c-c-c or any other ordering of a, b, and c).
[0166] No element, act, or instruction used herein should be
construed as critical or essential unless explicitly described as
such. Also, as used herein, the articles "a" and "an" are intended
to include one or more items, and may be used interchangeably with
"one or more." Furthermore, as used herein, the terms "set" and
"group" are intended to include one or more items (e.g., related
items, unrelated items, a combination of related and unrelated
items, and/or the like), and may be used interchangeably with "one
or more." Where only one item is intended, the phrase "only one" or
similar language is used. Also, as used herein, the terms "has,"
"have," "having," and/or the like are intended to be open-ended
terms. Further, the phrase "based on" is intended to mean "based,
at least in part, on" unless explicitly stated otherwise.
* * * * *